Nonequilibrium spin transport on Au(111) surfaces

Ming Hao Liu, Son Hsien Chen, Ching Ray Chang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The well-known experimentally observed sp -derived Au(111) Shockley surface states with Rashba spin splitting are perfectly fit by an effective tight-binding model, considering a two-dimensional hexagonal lattice with pz orbital and nearest-neighbor hopping only. The extracted realistic band parameters are then imported to perform the Landauer-Keldysh formalism to calculate nonequilibrium spin transport in a two-terminal setup sandwiching a Au(111) surface channel. Obtained results show strong spin density on the Au(111) surface and demonstrate (i) intrinsic spin-Hall effect, (ii) current-induced spin polarization, and (iii) Rashba spin precession, all of which have been experimentally observed in semiconductor heterostructures but not in metallic surface states. We therefore urge experiments in the latter for these spin phenomena.

Original languageEnglish
Article number195413
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number19
DOIs
Publication statusPublished - 2008 Nov 13

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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